Research, published in 2008 in the journal Archives of Internal Medicine, shows that those with the lowest vitamin D levels more than double their risk of dying from heart disease, stroke and other causes, compared with those with the highest vitamin D levels. The researchers cite “decreased outdoor activity” as one reason that people may become deficient in vitamin D.
Another recent study found an increased risk of heart attacks in men with low vitamin D levels, but that didn’t hold true for women. However, getting enough sun may help women prevent breast cancer. Canadian researchers compared 3,101 breast cancer victims with 3,471 healthy women without tumors.